Why categorization matters

Categorization isn't bookkeeping busywork — it's how raw spending becomes information. Done consistently, it tells you what drives your costs, maximizes deductions at tax time, and makes month-over-month comparison meaningful. Done sloppily, it produces a P&L nobody trusts.

Build a chart of accounts you'll actually use

The most common mistake is too many categories. Forty expense accounts means every transaction is a judgment call and nothing is comparable. Aim for 15–25 expense categories that map to how you actually run the business:

Cost of goods sold (the direct costs of what you sell)
Payroll and contractor costs
Rent and utilities
Software and subscriptions
Marketing and advertising
Professional services (legal, accounting)
Travel and meals
Office supplies and equipment

Separate COGS from operating expenses

The single most important distinction is direct costs (COGS) versus operating expenses (overhead). Getting this wrong destroys your gross-margin number. If a cost rises and falls with sales volume, it's likely COGS; if it's there whether you sell anything or not, it's overhead.

Rules over judgment

Set bank-feed rules so recurring vendors auto-categorize. "Anything from AWS → Software" eliminates the decision entirely.
Document edge cases in a short policy ("client lunches → Travel and Meals; team lunches → Payroll/benefits") so categorization is consistent across whoever does the books.
Tag, don't multiply. Need to track spend by project or department? Use tags or classes, not new accounts.

Capture receipts at the point of spend

The deduction you can't substantiate is the deduction you lose in an audit. Photograph receipts when you spend, attach them to the transaction, and you'll never reconstruct a year from memory in April.

Review quarterly

Once a quarter, scan the "Miscellaneous" and "Uncategorized" buckets. A growing miscellaneous line is a sign your categories don't fit reality — refine them before the noise drowns the signal.

Expense Categorization Done Right

Why categorization matters

Build a chart of accounts you'll actually use

Separate COGS from operating expenses

Rules over judgment

Capture receipts at the point of spend

Review quarterly

See Hosting Books in action

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